One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,13,12)(11,14,16,15)(17,18)(19,26)(20,24)(21,29)(22,25)(23,28)(27,32)(30,31)(1,3)(2,5)(4,8)(6,7)(9,11,13,16)(10,14,12,15)(19,27)(23,31)(26,32)(28,30)(9,10,13,12)(11,15,16,14)(17,19)(18,23)(20,28)(21,30)(22,27)(24,32)(25,31)(26,29)(2,6)(5,7) involution — undirected(3,8)(5,7)(9,12,13,10)(11,14,16,15)(17,20,22,21)(18,24,25,29)(19,28,27,30)(23,32,31,26)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.